Switch



E, H. JACOBS 1,707,479

SWITCH April 2, 1929.

Filed Nov. 5, 1924 parts together,

Patented pr. 2, 1929.

UNITED STATES [PATENT ori-'ICE'.

IIRJH'ESTv H. JACOBS, OE CHICAGO, ILLINOIS, ASSIGNOR T0 ELECTRICALENGINEERS EQUIPMENT CO., OF CHICAGO, ILLINOIS, A CORPORATION 0FILLINOIS.

SWITCH.

Application led Novembei 3, 1924. Serial No. 747,512.

My invention relates to the construction of transmission lines forelectrical power, and more specifically to an improved electricalconnection and disconnecting means between a bus bar or other source ofcurrent and a line to be connected thereto. Among the objects of theAinvention may be included the provision of a much simpler and cheaperform of switch to give the same service as the standard switch with alarge grounded base plate and two spaced insulators separately mountedthereon to carry the switch.` v

A further object involves securing the same degree of safety for thesimplified construction as obtained' for the former type.

Other objects and advantages of the invention will become apparent asthe description proceeds. j

lIn the accompanying drawings Fig. 1 is a side elevation partly insection and Fig. 2 a section on line 2-2 of Fig l indicating theconstruction of a connection and switch embodying the principles of the(invention.

The upper terminal 10 is preferably a one-piece casting having ahorizontal switch terminal l2 projecting laterally therefrom, and spacedconnecting and supporting bars 14 extending up to be clamped to the busbar-16 by clamps 18.

The lower terminal 20 is preferably also of one piece constructionlcomprising the laterally projecting switch terminal 22 and thedownwardly projcctingflange 24 to which the line member 26 may besuitably bolted.

Both terminals are suitably attached as by means of bolts 28 to caps 30,each comprising a cover plate portion lying in contact with theterminal, an outer flange 32 and an inner expanded base 34. Theinsulator structure connecting the caps 4has suitable pockets forreceiving the bases 34,l

and a` filling of cement 36 iirmly fastens the and seals the annularclearance between anges y32 and the insulator structure.

The switch illustrated comprises floating blades 38 pivoted to switchterminal 22, and held in suitable engagement with terminal l2 when theswitch is closed by cross bolts 40. The ends of the blades projectingbeyond bolts 4() may be offset at 42 into contact, and apertured at 44for the rece tion of a tool for opening the switch.

standpoint of safety. safety, I form the insulating structure of twoSwitch terminal 22 has a stop block 46 v against which the lowerl edgesof blade 38 engage .when the switch is opened 90 degrees,

to limit further movement.

between the bus bars 16 and 26 are avoided and a generally improved andsimplified mounting is provided for mounting a switch, or the like,between the 4bus bar 16 and line bus 26.

If the insulating structure were a single insulator; any defect in theinsulator might result in electrical connection between line 26 and'busbar 16 when the switch .was open. This would be a serious defect fromthe To provide complete duplicate insulators 48, placed end to end andunited by cement 50 to a grounding plate 52 having expanded bases 54extending in both directions into the pockets in the insulators. Theplate is formed with a laterally projecting eye 56 for connection to anysuitable ground, as indicated ldiagrammatically at 58.

I preferably make each insulator 48 of ample dielectric strengthtowithstand the full voltage to be carried by the insulating structureas a whole. Thus a defect in either insulator, would connect the line onthat side to the grounding plate, without any risk of potential being`delivered to the other'line when the switch has been opened.Electrically, this constitutes the structure the full equivalent of themuch more expensive switch structure comprising a large grounded baseplate forming the supports for two spaced insulators and terminalssurmounting the same to be connected by a switch.

lVithout further elaboration, the foregoing will so fully explain thegist of my invention, that others may, by applying current knowledge,readily adapt the same for use under various conditions of service,without eliminating certain featuresl which may properly be said toconstitute the essential items of noveltyinvolved, which items are thefollowing claims.

intended to be defined and secured to me by I claim 1. In a switch, incombination, a unitary insulator structure, connections at the endsthereof extending parallel to the axis thereof and running to the linesto be connected and disconnected, switch terminals at the endsprojecting laterally perpendicular to the insulator axis, a switch bladepivoted on one terminal and movable into and out of contact with theother terminal, said insulator structure being supported by saidconnections, said insulator structure comprising two co-axial insulatorsplaced end to end, and a grounding plate between the juxtaposed ends,either insulator being of ample insulating strength for the voltage to lendured by the structure.

2. In a switch, in combination, a unitary insulator structure,connections at the ends thereof running to the lines to be connected anddisconnected, switch terminals at the ends, a switch blade pivoted onone terminal and movable into and out of contact with the otherterminal, said insulator structure being supported by said connections,said insulator structure comprising two co-axial insulators placed endtoend, and a grounding plate between the juxtaposed ends, either insulatorbeing of ample insulating strength for the voltage to be endured by thestructure.

3. In a switch, in combination, a unitary insulator structure,connections at the ends thereof running to the lines to be connected anddisconnected, switch terminals at the ends, a switch blade pivoted onone terminal and movable into and out of contact with the otherterminal, said insulator structure comprising two co-axial insulatorssecured. to the opposite sides of a metallic plate.

4f. In a switch, in combination, a unitary l insulator structure,connections at the ends thereof running to the lines to be connected anddisconnected, switch terminals at the ends, a switch blade pivgted onone terminal and movable into and out of contact with the otherterminal, said insulator structure comprising two co-axial insulatorsplaced end to end, and a (grounding plate between the juxtaposed eneither insulator being of ample insulating strength for the voltage tobe endured by the structure.

5. In a switch, in combination, switch terminals, a switch bladepivoted, on one terminal and movable into and out of contact with theother terminal, and -a unitary insulator structure supporting bothswitch terminals, said insulator structure comprising two co-axialinsulators, placed end to end, sand a grounding plate between thejuxtaposed ends, either insulator beinv of ample insulating strength forthe vol-tage to be endured by the structure.y

6. In a switch, in combination, switch terminals, a switch blade pivotedon one terminal and movable into and out of contact with the otherterminal, a unitary insulator structure comprising two co-axialinsulators placed end to end, and a grounding plate between thejuxtaposed ends, either insulator being of ample insulating strength forthe voltage to be endured by the structure.

7. In combination, a unitary insulating structure comprising anintermediate ground member and insulating sections, one on each side ofsaid ground member and joined rigidly thereto into a unitarystructure,'ter minal members, one on each side of said insulatingsections, a movable switch member for connecting vand disconnecting saidterminal members, and means on said terminal members for connecting theline aconductors thereto.

8. In a switch, in combination, a unitary insulator structure,connections at the end thereof running to the line to be connected anddisconnected, switch terminals at the end, a switch blade pivoted on oneterminal' and movable into and out of contact with `the other terminal,said insulator structure comprising a plurality of co-axial insulatorsplaced end to end, and a grounding plate 'between the juxtaposed7 endshaving expanded bases extending in opposite direction into saidinsulator, and means for making grounding connection thereto.

9. In combination, a pair of bus bars, a unitary insulator structure comrising a pair of insulators lying end to en between said bus bars andsupported thereby, terminal members at the ends of said insulatorstructure, means for connecting and disconnecting said terminal members,and an Y intermediate grounding member between the insulators.

10. In a switch, in combination, a unitary insulator structure,connections at the ends thereof running to the lines to be connected anddisconnected, switch terminals at the ends, a switch blade pivoted onone terminal and movable into and out of contact with the otherterminal, said insulator structure comprising a plurality of co-axialinsulators placed end to end, a grounding ,plate secured between thejuxtaposed ends of said insulators, said grounding plate having alaterally projecting portion lfor nialring grounding connection theretoand lying substantially opposite said switch blade.

1l. lIn combination, a unitary insulator structure comprising a pair ofinsulators lying end to end and an intermediate grounding member betweensaid insulators,

lline connections at the ends of said insulator structure, terminals atthe ends of said structure and means for connectlng and disconnectmgsaid terminals.

closed position, terminals for connecting said terminals to the lines tobe connected and disconnected.

13. In a switch, the combination of a rigid unitary insulatorstructure,a pair of switch terminals, one rigidly mounted upon each ofthe yopposite ends of said insulator structure and rigidly supported bysaid insulator structure, said switch terminalseach having a projectionprojecting laterally from said insulator* structure, a switch blademember` pivoted` upon the lateral projection of one of said terminalsand swingable into and lateral projection of the other terminal, Saidvblade member lying along the side lof the insulator structure in closedposition.

unitary insulator structure, Y terminals, one =rigidly mounted upon eachof the opposite ends of said insulator struc- Qture and rigidlysupported by said insuand out of contact with the lateral projection of`the other terminal, said switch member lying along vthe side of theinsulatorr structure in closed position, a connecting member rigid withone of said switch terminals and extending longitudinally therefrom forthe lines Y necting the other switch terminal to the other line to beconnected. i

15. In a switch, the combination of a rigid unitary insulator structure,a pair of fittings, one rigidly .cemented to each of the connecting saidterminalto one'of from the insulator structure, and aswitch to-beconnected, and means for onprojecting at their opposite memberpivoted'upon the latf Y erally projecting end of one of said switchlterminals and swingable into and out, of contact with the laterallyprojecting end ot the other terminal,

`16.',In a switch,l the combination of` a i rigid unitary insulatorstructure, a pair of ttings, one rigidly cemented to each of theopposite endsot' said insulator structure and rigidly r`supported bysaid insulator struc-y f Nture,.a pair of switch terminals each rigidlattached at Lone end to one of said fittings and rigidly supportedinsulator ,and projecting at their opposite a switchmember pivoted uponthe laterally projecting end of one of said minals and swingable intoand out of contact with the laterally projecting end of the otherterminal, and means onsaid switch terminalsfor connecting said terminalsto the lines to be connected and disconnected.

In witness Whereof,; I'hereunto subscribe my name this 30th day ofOctober, 1924:.

ERNEST H. JACOBS.

upon the ends of the if switch terj

